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The Korea National Health and Nutrition Examination Survey (KNHANES) is a national program designed to assess the health and nutritional status of the noninstitutionalized population of South Korea. The KNHANES was initiated in 1998 and has been conducted annually since 2007. Starting in the latter half of 2008, ophthalmologic examinations were included in the survey in order to investigate the prevalence and risk factors of common eye diseases such as visual impairment, refractive errors, strabismus, blepharoptosis, cataract, pterygium, diabetic retinopathy, age-related macular degeneration, glaucoma, dry eye disease, and color vision deficiency. The measurements included in the ophthalmic questionnaire and examination methods were modified in the KNHANES IV, V, and VI. In this article, we provide detailed information about the methodology of the ophthalmic examinations in KNHANES in order to aid in further investigations related to major eye diseases in South Korea.

BACKGROUND/OBJECTIVES : The aim of this study was to estimate average total fat and fatty acid intakes as well as identify major food sources using data from the Korea National Health and Nutrition Examination Survey (KNHANES) VI-1 (2013). : SUBJECTS...

The Dietary Survey Methodology Workshop (March 16-18, 1986) was sponsored by the National Center for Health Statistics for the purposes of reviewing, evaluating, and making recommendations for the selection of dietary methodologies for the third Nati...

This report presents an approach to analyzing data from a survey with a complex sample design. The data used to illustrate the approach are from the first National Health and Nutrition Examination Survey, a national probability sample survey that was...

"Human milk is the ideal food for most infants. Breastfeeding benefits infants and their mothers. Breastfed infants receive antibodies from breast milk, which protect against infection in the early postpartum period, and breast-feeding is less expens...

OBJECTIVES: This report presents national estimates of dietary intakes of macronutrients, micronutrients, and other dietary constituents for persons 2 months and older, by sociodemographic variables. : METHODS: The third National Health and Nutrition...